Peel and cut carrots into bite sized pieces. Preheat oven to 350F. Line a baking sheet with aluminum foil. Add carrots. Drizzle with 2 tbsp of olive oil.
Add the remaining 2 tbsp of olive oil to a pot. Heat over medium heat and add the onions. Cook for 2 minutes, then add the garlic and cook for 1 minute, stirring frequently.