1. Preheat oven to 400°. Melt butter in a large skillet over medium heat; add onions, and sauté 6 to 8 minutes or until tender.
2. Stir together frozen rice packages and next 6 ingredients; stir in onions. Spoon mixture into a lightly greased 13- x 9-inch baking dish. Top with sliced almonds.
3. Bake at 400° for 30 to 35 minutes or until bubbly and almonds are lightly browned. Let stand 10 minutes.
Note: We tested with Birds Eye Steamfresh Brown & Wild Rice With Broccoli & Carrots.