Heat the olive oil in a large skillet over medium heat.
Add the chopped onion and garlic, sautéing until translucent, about 3-4 minutes.
Increase the heat to medium-high and add ground turkey. Cook until browned, about 5-7 minutes, breaking it up into smaller pieces with a spatula.
Stir in the diced bell peppers and cook for an additional 3-4 minutes until they start to soften.
Add the canned diced tomatoes, smoked paprika, oregano, cumin, salt, and pepper. Mix thoroughly.
Bring the mixture to a simmer, cover, and cook for about 10-15 minutes for the flavors to meld together. If using, stir in the cooked quinoa or brown rice just before serving.
Taste and adjust seasoning if necessary.
Notes
Serve hot, garnished with fresh cilantro or parsley. Drizzle olive oil around the plate for a colorful touch.