Luscious Lime Angel Food Cake Rolls

From a Diabetic cookbook. Dietary exchanges are 2 starch. I can see this being really good using other kinds of yogurt, like raspberry or strawberry!

• Ready In: 40 mins
• Serves: 16

Ingredients

• 1 (16 ounce) package  angel food cake mix
• 2  drops  green food coloring (optional)
• 2 (8 ounce) containers  nonfat sugar-free lime yogurt
•  lime slice (optional)

Directions

1. Preheat oven to 350 degrees. Line two 17x11 1/4x1 inch jelly-roll pans with parchment or waxed paper; set aside.
2. Prepare angel food cake mix according to package directions. Divide batter evenly between prepared pans. Draw knife through batter to remove large air bubbles.
3. Bake 12 minutes or until cakes are lightly browned and toothpick inserted into centers comes out clean.
4. Invert each cake onto separate clean towel. Starting at short end, roll up warm cake, jelly-roll fashion, with towel inside. Cook cakes completely.
5. Place 1 to 2 drops green food coloring in each container of yogurt, if desired. Stir well.
6. Unroll cakes; remove towels. Spread each cake with 1 container yogurt, leaving 1 inch border. Roll up cakes; place seam side down. Slice each cake roll into 8 pieces.
7. Garnish with lime slices, if desired. Serve immediately or refrigerate.