Step 2
Heat olive oil in a skillet over medium heat. Add red bell pepper, yellow bell pepper, and jalapeno pepper. Cook, stirring constantly, until mostly tender, about 3 minutes. Add cumin; cook and stir until peppers are coated, about 1 minute. Add half-and-half and let simmer until nearly boiling. Reduce heat to low; slowly stir in American cheese, fontina cheese, mozzarella cheese, red pepper flakes, salt, black pepper, garlic powder, onion powder, and nutmeg. Cook, stirring queso dip constantly, until cheeses are completely melted, about 5 minutes.