Neutral cooking oil, such as canola or peanut oil, for frying
4 large eggs
1/2 cup whole or 2% milk
1/2 cup heavy cream
1/2 cup grated Parmesan, plus more for serving
1/2 teaspoon dry mustard powder, or more to taste
1/2 teaspoon kosher salt
1/2 teaspoon hot sauce, such as Tabasco
Freshly ground black pepper, to taste
1 large garlic clove, peeled and crushed
6 slices good-quality bread, cut 3/4- to 1-inch thick
Freshly minced herbs, such as chives or flat-leaf parsley, for garnish