Preheat oven to 350-degrees
In a saucepan or Dutch oven, saute the diced shallots in olive oil until translucent.
Add in the ground turkey or ground beef, paprika, Himalayan sea salt, black pepper, onion powder, and garlic powder and saute the ground turkey until cooked through.
Drain off excess fat, and transfer the ground turkey into a mixing bowl.
Slice the zucchini in half lengthwise, and use a spoon to scoop out the flesh, leaving a ½-inch thick shell all around the zucchini.
Chop the scooped-out medium zucchini flesh, and add to mixing bowl. Stir in the marinara sauce, yellow squash, chopped zucchini, red and green bell peppers, black olives, cubed sourdough, and Parmesan cheese.
Mix the stuffing until combined.
Lightly stuff each zucchini halves with the meat mixture.
Place the zucchini halves into a baking dish, and cover tightly with foil.
Bake at 350-degrees for 40-minutes. Remove from oven and top with shredded mozzarella and bake at 350-degrees for an additional 10-minutes or until cheese starts to bubble.