Brown ground beef in large skillet over medium-high heat for 8 to 10 minutes or until thoroughly cooked, stirring frequently. Drain. Add taco seasoning mix, water and soup; mix well. Bring to a boil. Reduce heat to low; simmer 3 minutes. Remove from heat.
Separate dough into 8 biscuits. Cut each biscuit into 8 pieces. Add pieces to ground beef mixture; stir gently. Spoon mixture into ungreased 13x9-inch pan.
Bake at 375°F for 18 to 23 minutes or until sauce is bubbly and biscuits are golden brown. Remove from oven. Sprinkle with cheese. Return to oven; bake an additional 8 to 10 minutes or until cheese is bubbly.
To serve, cut pizza into 8 squares. Top each serving with lettuce, tomatoes, salsa, olives, sour cream and onions.