Preheat oven to 425 degrees F.
Place tomatoes, jalapeno, onion wedges, and garlic cloves on a baking sheet. Roast vegetables for 25 minutes or until lightly charred, rotating them halfway through. Remove from oven.
Remove jalapeno stem and seeds, if desired. Peel off garlic skin. Place all roasted vegetables in a food processor along with cilantro, lime juice, cumin, salt, and pepper. Pulse until ingredients are coarsely chopped but not pureed. Transfer salsa to a bowl and set aside.
Prepare taco filling. Heat 1 tablespoon oil in a large saute pan over medium heat. Add turkey and cook until browned, breaking up meat with a wooden spoon into crumbles. Add chopped onion, bell pepper, and garlic and saute until vegetables are softened, about 4-5 minutes.
Season taco filling with chili powder, cumin, coriander, paprika, oregano, cayenne, salt, and pepper. Add tomato paste and water, stirring to combine. Simmer until all of the liquid has evaporated, about 5 minutes.
Meanwhile, make the toppings. Combine shredded cabbage with sour cream, cilantro, juice of ½ lime, and a pinch of sugar. Season with salt and pepper.
Fill taco shells with taco meat and serve with charred tomato salsa, cabbage slaw, diced avocado, and crumbled cotija.