Spinach Potatoes Au Gratin

5 cups thinly sliced red potatoes (about 7 large potates)
1/4 cup water
3 tablespoons butter
1/4 cup chopped onion
1/4 cup all-purpose flour
2 cups milk
1 cup (4 ounces) shredded cheddar cheese
1 teaspoon salt
1 cup chopped fresh spinach
1 tablespoon diced pimientos
4 bacon strips, cooked and crumbled

In a 2-qt. microwave-safe dish, combine potatoes and water. Cover and microwave on high for 8-9 minutes or until potatoes are tender, stirring twice. Drain; set potatoes aside.

In a large microwave-safe bowl, heat butter on high until melted, about 30 seconds. Add onion. Microwave, uncovered, for 1-2 minutes or until tender, stirring once.

Whisk in flour until blended. Gradually stir in the milk. Cook, uncovered, on high for 2-1/2 minutes; stir. Cook 3-4 minutes longer, stirring every minute, or until sauce is thickened and bubbly. Stir in cheese and salt. Pour over potatoes. Add spinach and pimientos; mix well.

Microwave, uncovered, on high for 2-3 minutes or until heated through, stirring once. Sprinkle with bacon. Makes 8 servings.