Understanding Eggplant Basics and Selection
Eggplant is a versatile vegetable that works well in many dishes, including the classic Italian-American preparation known as eggplant Parmesan. Before you begin preparing eggplant, it helps to understand what you're working with and how to choose the best specimens at the market or grocery store.
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Eggplants come in several varieties, with the most common being the large, dark purple globe eggplant found in most supermarkets. Other varieties include Italian eggplants, which are smaller and more slender, and Asian varieties like Japanese long eggplants or Thai eggplants. For eggplant Parmesan, the standard globe variety works best because of its size and flesh content. The skin should be deep purple or nearly black and should feel glossy and smooth to the touch. Avoid eggplants with soft spots, wrinkled skin, or dull coloring, as these indicate the vegetable is past its prime.
When selecting eggplants, look for ones that feel firm but not rock-hard when you gently press them. A ripe eggplant should have some slight give to it, similar to the feel of a ripe avocado. The vegetable should feel relatively heavy for its size, which indicates good water content and quality flesh. Size matters too—medium to large eggplants (about 8 to 10 inches long) tend to have fewer seeds and less bitterness than very large specimens. Very small eggplants are often younger and more tender, which can work well, but may not yield enough flesh once prepared.
Eggplants continue to ripen after being picked, so if you purchase them a day or two before using them, store them at room temperature rather than in the refrigerator. Once you plan to use them within 24 hours, you can refrigerate them to slow the ripening process. A fresh eggplant will keep in the refrigerator for about a week before the skin begins to wrinkle and the quality declines.
Practical takeaway: Choose eggplants with glossy, deep purple skin, medium to large size, and a firmness that yields slightly to pressure. Store at room temperature until you're ready to prepare them.
Washing and Initial Preparation Steps
Once you bring your eggplants home, proper washing and initial preparation are important for both food safety and texture. These first steps set the foundation for the rest of your cooking process.
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Start by rinsing your eggplants under cool running water. Use your hands to gently rub the skin while rinsing to remove any dirt, dust, or debris from the surface. The skin of an eggplant is edible and contains beneficial fiber and nutrients, so you'll want to keep it intact during washing. Pat the eggplant dry with a clean kitchen towel or paper towel. Moisture on the surface can interfere with browning during the cooking process, so make sure it's thoroughly dry before moving to the next step.
Next, you'll need to trim the eggplant. Using a sharp chef's knife, carefully cut off the green stem end at the top of the eggplant. You should remove about half an inch to an inch of the stem. Some recipes call for peeling the eggplant skin before slicing, while others leave it on. For eggplant Parmesan, many cooks prefer to leave the skin on because it helps the slices hold their shape during cooking and frying. However, if you prefer a texture without the skin, use a vegetable peeler to carefully remove thin strips of skin lengthwise down the eggplant, leaving some skin intact for structural support.
After trimming, you're ready to slice the eggplant into rounds. The thickness of your slices matters for cooking time and texture. For eggplant Parmesan, slices should be about one-quarter to one-third inch thick. Using a sharp knife makes this task easier and produces cleaner cuts with less crushing of the flesh. If you have a mandoline slicer, it can produce very uniform slices, though you must be careful with your fingers. Cut your eggplant crosswise (perpendicular to the length) to create round slices rather than lengthwise slices.
Practical takeaway: Wash eggplants gently, trim the stem end, keep the skin on for structure, and slice the eggplant crosswise into quarter-inch to one-third inch thick rounds using a sharp knife.
Removing Moisture and Bitterness
One of the most important steps in preparing eggplant for Parmesan is removing excess moisture from the vegetable. Eggplant contains a high water content—about 92 percent water by weight. If this moisture isn't removed before cooking, your eggplant Parmesan will turn out watery, soggy, and the breading may not brown properly. Additionally, older or larger eggplants can contain compounds that taste bitter, and the salting process helps reduce this undesirable flavor.
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The traditional method for removing moisture is salting. After you've sliced your eggplant, arrange the slices in a single layer on a cutting board, baking sheet, or colander. Sprinkle both sides of each slice generously with salt—about one-quarter to one-half teaspoon per slice. The salt works by drawing water out of the eggplant tissue through osmosis. This process typically takes about 30 to 45 minutes. You'll notice that liquid begins to bead on the surface of the eggplant slices. This is the moisture being drawn out, along with some of the compounds that contribute to bitterness.
After the salting time has passed, use a clean kitchen towel or paper towels to gently pat the eggplant slices dry. You want to remove as much of the liquid and salt as possible. This step is crucial—if you don't dry the slices well, they'll steam rather than fry, and you won't achieve the desired golden-brown exterior. Be gentle when wiping, as the eggplant flesh becomes slightly softer after salting and can tear easily.
Some cooks prefer an alternative or additional method: baking the salted eggplant slices in a hot oven at 400 to 425 degrees Fahrenheit for about 10 to 15 minutes. This removes additional moisture through evaporation and can also help soften the eggplant slightly, which some prefer for the final dish's texture. You can use both methods together—salt the eggplant first, then bake it before proceeding to breading and frying.
Practical takeaway: Salt your eggplant slices generously and allow them to sit for 30 to 45 minutes, then pat them dry thoroughly with towels. For additional moisture removal, bake salted slices at 400 to 425 degrees for 10 to 15 minutes.
Breading and Seasoning Techniques
Breading eggplant creates the crispy, golden exterior that makes eggplant Parmesan so appealing. The breading also protects the delicate eggplant flesh during frying and adds texture and flavor to the finished dish. Understanding proper breading technique will result in a more professional appearance and better texture.
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To bread eggplant, you'll need three separate shallow dishes or bowls. In the first bowl, place all-purpose flour mixed with salt and pepper to taste—about one-quarter teaspoon of salt and one-eighth teaspoon of black pepper per cup of flour is a good starting point. In the second bowl, beat two or three eggs together with a splash of water, milk, or a combination. In the third bowl, place breadcrumbs. You can use store-bought panko breadcrumbs or regular breadcrumbs. Panko breadcrumbs are larger and create a crunchier texture, while regular breadcrumbs create a more delicate crust. Some cooks mix breadcrumbs with grated Parmesan cheese (about one part cheese to three parts breadcrumbs) and dried Italian herbs for additional flavor.
The breading process involves a three-step dredging technique. First, coat each eggplant slice lightly in the flour mixture, shaking off any excess. This initial flour layer helps the egg