INGREDIENTS
1
cut into thick 8-inch-thick slices 6 ounces pancetta
2
packed cups Baby spinach
1 tsp
Kosher salt
1
Vegetable oil cooking spray
1 tbsp
Vegetable or canola oil
1
thick 16 (1/3-inch-thick) slices White bread, country-style
1/2 cup
Butter, unsalted
2 cups
Cheddar, mild
2 cups
Monterey jack cheese