(Gluten-Free) Crispy Eggplant Sandwich

One medium eggplant, thinly sliced
2 cups gluten-free breadcrumb
1 teaspoon garlic powder
1 teaspoon dried oregano
Three eggs
3 cups gluten-free flour
One cup olive oil
One loaf, gluten-free bread
Mozzarella cheese
Fresh basil
Marinara sauce