1. Preheat oven to 425 degrees Fahrenheit.
2. Scrub the potatoes thoroughly under running water and pat them dry. Prick the potatoes in a few places with your fork. Place the potatoes in a baking dish and bake for 40 to 50 minutes or until potatoes are tender.
3. While the potatoes are baking, make the meat sauce. In a large, deep skillet, add olive oil and onion sauté until translucent. Add garlic, carrot, and celery and sauté for five more minutes.
4. Add meat, brown and crumble. Add tomato paste and flour and cook, stirring, for two minutes. Add water or stock, salt, and pepper. Cover and let simmer on low for 45 minutes. Add peas and cook for an additional five minutes.