In a large skillet, heat the olive oil over medium heat. Add the ground beef and cook until browned, breaking into pieces as it cooks, 7-10 minutes. Drain grease and return the ground beef to the pan.
1 Tablespoon extra virgin olive oil, 1 pound ground beef
Add the diced carrot, onion, frozen peas, frozen corn and minced garlic, salt and black pepper.
1 medium red onion, 1 large carrot, ¾ cup frozen peas, ¾ cup frozen corn, 2 cloves garlic, 1 teaspoon salt, ½ teaspoon black pepper
Cook for an additional 5 minutes, stirring occasionally. Spoon the beef mixture into the bottom of the crockpot.
Spread the mashed potatoes on top of the beef mixture, making sure to cover it completely. Cook on high for 3-4 hours or on low for 6-8 hours, until the potatoes are golden brown and the filling is hot and bubbly. Top with parsley, if using. 2 Tablespoons fresh parsley