Strawberry Angel Trifle

1 (16 oz.) pkg. one-step angel food cake mix
1 (6 oz.) pkg. strawberry gelatin
2 c. boiling water
3/4 c. plus 1/3 c. sugar, divided
5 c. fresh or frozen unsweetened strawberries, thawed and drained
2 c. whipping cream

Prepare and bake cake mix according to package directions; cool completely. In large bowl dissolve gelatin and 3/4 cup sugar in boiling water. Mash half of the strawberries; add to gelatin mixture. Refrigerate until slightly thickened, about one hour. Slice remaining strawberries; stir into gelatin. Cut cake into 1-inch cubes. Place half in 3-quart trifle or glass bowl. Top with half of gelatin mixture. Repeat. Cover and refrigerate until set, about four hours. In mixing bowl beat cream until soft peaks form. Gradually add remaining sugar, beating until stiff peaks form. Spoon over gelatin. 12-16 servings.