Season chicken breasts with chili powder, smoked paprika, cumin, salt, and black pepper. Let rest for 10 minutes.
Heat olive oil in a skillet over medium heat. Sauté garlic, red bell pepper, and red onion for 2-3 minutes.
Add corn kernels and cook for 5-6 minutes until slightly caramelized.
Preheat a grill pan or outdoor grill over medium-high heat. Grill chicken 5-7 minutes per side until fully cooked, then let rest 5 minutes.
In a serving bowl, layer quinoa or cauliflower rice, sautéed vegetables and corn, sliced chicken, avocado, and crumbled cheese.
Sprinkle with fresh cilantro and squeeze lime juice over the top. Add Greek yogurt if desired.
For a keto ramen variation, cook keto ramen noodles according to package instructions and use them as the base before adding the other ingredients.