Idaho® Potato Chorizo Au Gratin

Ingredients:

• 3 pounds Idaho® russet potatoes 
• 8 ounces Spanish chorizo links or cooked sausage links, sliced 1/8-inch thick
• 3/4 cup cheddar cheese, shredded
• 3/4 cup Asiago cheese, shredded
• 3/4 cup Romano cheese, shredded
• 1 teaspoon salt
• 1/2 cup onion, very thinly sliced
• 2 medium jalapeño peppers, thinly sliced in rings, seeded if desired
• 2 to 2 1/2 cup heavy cream or half and half

Instructions:

1. Heat oven to 300°F (convection) or 325°F (conventional). Butter a 2-1/2-inch deep half size pan (10"x12") or 2-quart casserole, or twelve 8-ounce ramekins.
2. Peel potatoes and slice 1/16-inch thick with a mandolin. Place slices in cold water while working. Meanwhile, bring a large pot of water to a boil.
3. Add sliced potatoes to boiling water. When water returns to a boil, cook 1 minute or just until potatoes are translucent. Drain and rinse with cold water. Spin dry in a salad spinner or pat dry between towels.
4. Cook sausage over medium-high heat until browned and most of the fat is rendered. Drain on paper towel.
5. Combine cheeses and salt. Mix well.
6. Shingle 1/3 of the potatoes evenly in pan, top with 1/3 of the cheese and half the sausage, onion and jalapeño. Repeat layers. End with remaining 1/3 of potatoes and cheese. (Or portion layers in ramekins.) Pour cream evenly over potatoes to cover at least ½-inch depth from bottom of pan.
7. Cover with foil, tenting if needed to keep from touching the cheese. 
8. Bake 1-1/2 to 2 hours (about 45 minutes for ramekins), until barely bubbling on the edges and potatoes are tender-firm. Test by inserting a pick in center. Remove foil and bake about 20 minutes until golden brown.
9. Cool 15-20 minutes before serving. Leftovers can be reheated.