Cut Italian bread into 1 inch cubes.
In cast iron skillet over medium-high heat, place 2 Tbsp. olive oil & butter. Once butter is melted, add garlic. Stir in cubed bread, coating thoroughly in olive oil & butter.
Place skillet in 400° degree oven and cook for 18-20 minutes, stirring once halfway through until bread is nicely toasted.
Remove from oven & set aside to cool to room temperature while making vinaigrette.