spinach and artichoke mac and cheese

Ingredients

• 1lb. package penne pasta
• 2 tablespoons olive oil
• 3 tablespoons butter
• 1 large onion-finely chopped
• 3 cloves garlic chopped
• 3 tablespoons flour
• 1/2 cup white wine
• 2 cups whole milk
• a few - grates of nutmeg
• 1 box chpd. frozen spinach - defrosted and squeezed dry
• 1 can artichoke hearts in water-drained n roughly chpd.
• - black pepper
• 1 1/4 cups parmesean cheese
• 1 1/4 cups shredded mont.jack cheese(& or shredded provalone or mozzerella)