Greek Style Mac 'n Cheese

INGREDIENTS

• 1 pound elbow macaroni
• 3 tablespoons olive oil, divided
• 1 medium onion, chopped
• 1 clove garlic, chopped fine
• One 10 ounce bag fresh bagged spinach, roughly chopped
• generous pinch of salt
• 3 tablespoons flour
• 3 cups milk
• freshly ground pepper
• 1/8 teaspoon freshly grated nutmeg
• 2 cups grated Havarti cheese with dill , or regular Havarti plus 1 tablespoon fresh dill or 1 teaspoon dried dill
• One 8 ounce package feta cheese, crumbled
• 1 - 12 ounce jar Kalamata olives, chopped
• 1 tablespoon capers
• 2 tablespoon sun-dried tomatoes, chopped
• 1/2 cup bread crumbs or panko crumbs