Heat olive oil in a large skillet or pot over medium heat.
Add diced chicken and cook until lightly browned, about 5–6 minutes.
Stir in onion and garlic; cook for 2–3 minutes until fragrant.
Add rice, chicken broth, salt, pepper, and paprika. Stir well.
Bring to a boil, then reduce heat to low. Cover and simmer for 18–20 minutes.
Stir in frozen vegetables, cover again, and cook for 5 more minutes.
Remove from heat and let sit for 5 minutes before fluffing and serving.
Notes
Swap chicken for sausage or canned beans to make it even cheaper.
Add soy sauce or hot sauce for extra flavor.
Leftovers store well in the fridge for up to 4 days.