Cut eggplant in half, then slice a perimeter 1/2 inch from the edge of the shell. Cut a grid shape in the middle, being careful not to pierce the skin. Scoop out the eggplant meat with a spoon, set the shells aside.
In a large skillet, sauté onion and garlic until softened, about 5 minutes. Add the bell pepper, zucchini, eggplant meat, and tomatoes. Sprinkle in the Italian herbs. Cook vegetables until crisp-tender, about 5 more minutes.
Scoop mixture back into the eggplant shells, top with cheese, then bake until shells are tender, 45-50 minutes.
Notes
This dish works great as a veggie side, but could also serve as a main with the addition of a protein rich grain or leftover chicken.