In a Dutch oven, cook beef with squash and pepper over medium-high heat until no longer pink; crumble beef; drain. Stir in soup mix, brown sugar, V8 juice, water and cabbage; bring to a boil. Reduce heat; simmer, covered, until cabbage is tender, 8-10 minutes, stirring occasionally. , Stir in rice; return to a boil. Simmer, covered, 5 minutes. Remove from heat; let stand, covered, until rice is tender, about 5 minutes.