Steakhouse Florentine Burger - Bertolino Foods

Ingredients

• 1 package Certified Angus Beef ® Bertolino Foods Chuck Brisket patties
• 1 1/2 teaspoons kosher salt, divided
• 3/4 teaspoon black pepper, divided
• 2 tablespoons butter
• 3 cloves garlic, minced
• 1 shallot, minced
• 12 ounces fresh spinach, washed
• 1/2 cup heavy cream
• 1/2 cup grated Parmesan cheese
• One pinch ground nutmeg
• 4 slices Swiss cheese
• 4 hamburger buns