Step 1: Prepare the Eggplant (The “Sweating” Process)

This is the most crucial step to prevent a watery final dish. Do not skip it!

1. Wash and dry the eggplants. Trim off the top stem and bottom end. You can choose to peel the eggplants completely for a more tender result, or leave the peel on for more texture and nutrients. I prefer to peel it in “stripes” with a vegetable peeler, leaving some of the skin on for structure.
2. Slice the eggplants into ½-inch thick rounds.
3. Arrange the eggplant slices in a single layer on baking sheets lined with paper towels. You may need two baking sheets.
4. Sprinkle both sides of the slices generously with kosher salt.
5. Let the eggplant sit for 45-60 minutes. You will see beads of water form on the surface. This process, called “sweating” or “degorging,” draws out excess moisture and some of the eggplant’s natural bitterness.
6. After an hour, use paper towels to firmly pat the slices dry, wiping away the salt and all the moisture that has been drawn out.

Step 2: Set Up Your Breading Station

Efficiency is key here. Create an assembly line with three shallow dishes.

1. Dish 1 (Flour): Place the 1 cup of all-purpose flour in the first dish.
2. Dish 2 (Egg Wash): In the second dish, whisk the 3 large eggs until smooth.
3. Dish 3 (Breadcrumb Mixture): In the third dish, combine the 2 cups of Panko breadcrumbs, ½ cup of the grated Parmesan cheese, 1 tablespoon of Italian seasoning, 1 teaspoon of garlic powder, and ½ teaspoon of black pepper. Mix well with a fork.

Step 3: Bread and Sear the Eggplant Slices

This step builds the foundation of flavor and texture.

1. Heat 2 tablespoons of olive oil in a large non-stick skillet over medium-high heat.
2. Working with one eggplant slice at a time, dredge it in the flour, shaking off the excess. Then, dip it completely into the egg wash, allowing the excess to drip off. Finally, press it firmly into the Preadcrumb mixture, ensuring both sides are fully coated.
3. Carefully place the breaded slices into the hot skillet. Do not overcrowd the pan; work in batches of 3-4 slices at a time.
4. Pan-sear for 2-3 minutes per side, until the coating is golden brown and crispy. The goal here is not to cook the eggplant through, but to create a flavorful, crisp crust.
5. As the slices are done, transfer them to a clean plate or wire rack. Add more olive oil to the skillet as needed between batches.

Step 4: Assemble in the Slow Cooker

Now for the easy part: layering all that goodness.

1. Spread a thin layer of the crushed tomatoes (about ½ cup) on the bottom of a 6-quart or larger slow cooker. This prevents the first layer of eggplant from sticking.
2. Arrange a single layer of the pan-seared eggplant slices over the sauce, slightly overlapping them if necessary.
3. Top the eggplant layer with about one-third of the remaining crushed tomatoes.
4. Sprinkle with one-third of the minced garlic, one-third of the chopped fresh basil, one-third of the grated mozzarella, and one-third of the reserved Parmesan cheese.
5. Repeat the layering process two more times: eggplant, sauce, garlic, basil, mozzarella, Parmesan. You should end with a final, generous layer of mozzarella and Parmesan cheese on top.

Step 5: Slow Cook to Perfection

1. Cover the slow cooker and cook on the LOW setting for 4 to 6 hours, or on the HIGH setting for 2 to 3 hours.
2. The dish is ready when the sauce is bubbly, the cheese is completely melted, and a knife inserted into the center goes through the eggplant layers with no resistance. The eggplant should be exceptionally tender.
3. Optional (but highly recommended) Final Step: For that classic, golden-brown, bubbly top, carefully remove the ceramic insert from your slow cooker (if it is oven-safe) and place it under your oven’s broiler for 2-4 minutes. Watch it very closely to prevent burning! It just needs a moment to get beautifully browned. If your insert is not oven-safe, you can let the dish rest, uncovered, for 10-15 minutes before serving, which will help it set up.