Heat oven to 375 degrees F. Lightly spray 12 standard muffin cups with non-stick cooking spray.
Peel and quarter potatoes, boil in salted water until tender (about 15 minutes).
While the potatoes cook, heat a large nonstick frying pan over medium-high heat then add olive oil and ground beef. Add steak seasoning then cook, occasionally using a spoon to break up meat, until browned.
Add ketchup, Worcestershire sauce and frozen vegetables then cook 2-3 minutes until heated through. Taste for seasoning and add salt or pepper as necessary. Remove from heat and set aside.
Unroll crescent dough on lightly floured work surface. Press dough into 12x9-inch rectangle. Cut into 12 evenly sized rectangles. Fill each muffin cup with 1 square, gently pressing dough into bottom and sides of cup.
Drain then mash potatoes with cream and season to taste with salt and/or pepper.
Fill each dough cup with 1-2 tablespoons of beef filling then top with a spoonful of mashed potato. Bake in oven 15-20 minutes until dough is golden brown. Cool 5 minutes then serve.
* TIME SAVING TIP: Use Betty Crocker instant mashed potatoes!