Preheat oven to 425 degrees. Combine carrots, potatoes, onion and garlic with melted butter in 8x8" square glass pan. Season generously with salt and pepper, toss. Cover pan with aluminum foil and bake for 45 minutes. Uncover, stir and continue baking for another 30 minutes (or until browned to your satisfaction), stirring occasionally to lift bottom portions to top to allow to brown and crisp.