Slow-Cooker Beef Chili

Name: Slow-Cooker Beef Chili
Prep time: 15 min
Total time: 15 min
Cuisine: American
Ingredients: 2 lb. ground beef; 1 large onion, chopped; 2 tbsp. tomato paste; 2 (15-oz.) cans kidney beans, drained and rinsed; 1 (28-oz.) can crushed tomatoes; 1 c. beer (or water); 4 cloves garlic, minced; 1 tbsp. chili powder; 1 tsp. ground cumin; 1 tsp. dried oregano; 1/2 tsp. paprika; Pinch cayenne pepper (optional); Kosher salt; Freshly ground black pepper; Shredded cheddar, for serving (optional); Fritos, for serving (optional); Thinly sliced green onions, for serving (optional)