Preheat oven to 425° Fahrenheit.
Place bread in food processor and pulse until it becomes the consistency of breadcrumbs.
Spread oil onto a 9x13 (or similar sized) baking dish. Add cod. Sprinkle cod with salt and then drizzle with the lemon juice.
Cover with foil and bake for about 10 minutes.
Meanwhile, melt butter in a cast-iron or nonstick skillet over medium heat. Add the garlic and cook for another 30 seconds or until fragrant. Mix in the fresh breadcrumbs, the parsley, and the grated cheese.
Remove fish from oven and spread the breadcrumb mixture onto the cod. Return to the oven and bake for another 5-10 minutes, or until the fish is cooked through. Garnish with sliced grape tomatoes (or these can be cooked with the cod if you prefer) and more fresh parsley.