Place the garlic, butter and olive oil in a large microwave-safe bowl. Microwave on high for 30 seconds, remove bowl and stir. Return to microwave for another 30 seconds until butter is melted and garlic is fragrant. This may take another 10-20 seconds depending on your microwave.
Add cubed bread to bowl with butter mixture. Toss gently to coat. Immediately add Parmesan cheese, a sprinkle of sea salt and a few grinds of black pepper. Toss again to coat.
Transfer bread mixture to a large baking sheet and place in the preheated oven. Bake for 15 minutes then remove, and stir. The croutons on the outside will tend to brown quicker than those in the center. Return to oven, and bake for about 15 more minutes or until crisp and golden. Allow to cool completely, then store in an airtight container. Can be frozen for several weeks in an airtight container or ziplock back. Bring to room temperature before serving.
Notes
Notes: You can really use any type of bread. I prefer an artisan-type bread, but you can use leftover hamburger buns, dinner rolls, sandwich bread, whole grain breads, baguettes, etc. The only kind of bread I wouldn't recommend is the super soft, white, squishy grocery store type.