Low Carb Burrito Zucchini Boats

Name: Low Carb Burrito Zucchini Boats
Ingredients: 3 medium zucchinis (halved lengthwise); 2 tablespoons extra virgin olive oil (divided); sea salt and black pepper (to taste); ¼ cup white onion (diced small); 2-3 cloves garlic (large, finely minced); 1 lb. ground beef (80/20); 2 tsps chili powder; 1 tablespoon ground cumin; ½ tablespoon smoked paprika; 1 cup cheddar cheese (sharpe shredded, divided); 1 large avocado (seeded and diced); 1 large red (or green jalapeño, diced small); 1/3 medium red onion (diced); 20 tomatoes (or grape tomatoes, diced); ¼ cup fresh cilantro leaves (chopped); 3 tablespoons fresh lime juice; Optional: fresh lime wedges and additional cilantro (to serve); ½ cup sour cream; ½ tablespoon chili powder; ¼ tablespoon ground cumin; ¼ tablespoon smoked paprika; ¼ tablespoon garlic powder; ¼ tablespoon onion powder; ¼ tablespoon salt; pinch black pepper