Tamale Pie Stuffed Peppers

Name: Tamale Pie Stuffed Peppers
Ingredients: 1 tbsp. extra-virgin olive oil; 1 onion, chopped; Kosher salt; Freshly ground black pepper; 2 cloves garlic, minced; 1 lb. ground beef; 2 tbsp. tomato paste; 2 tsp. ground cumin; 2 tsp. chili powder; 1 (10-oz) can red enchilada sauce; 2 boxes Jiffy corn muffin mix; 1 c. frozen corn; 1 c. sour cream, plus more for serving; 4 tbsp. melted butter; 2 large eggs; 8 bell peppers, tops and cores removed; 1 c. shredded Cheddar; 1 c. shredded Monterey jack; 2 green onions, thinly sliced; Sour cream, for serving