In a medium saucepan over medium-high heat, add the olive oil and chopped onions. Sauté for 3-4 minutes until the onions become translucent but not browned.
2 Tablespoons olive oil, 1 large onion
Add the lean ground beef to the saucepan. Use a wooden spoon or a meat cutter to break apart the beef and crumble it as it cooks. Continue cooking until the beef is browned.
1.5 pounds lean ground beef
Stir in the chopped bell peppers, salt, black pepper, paprika, and minced garlic. Cook for an additional 2-3 minutes or until the mixture becomes fragrant. Set it aside to cool slightly, which should take approximately 20 minutes.
1/2 cup assorted bell peppers, 1/2 cup green peppers, Salt to taste, 1/2 teaspoon black pepper, 1 teaspoon paprika, 2 cloves of garlic
Preheat the oven to 350 degrees Fahrenheit.
Lay out the phyllo dough on a large cutting board. Place a damp towel lightly over it to prevent the phyllo from drying out. Take one sheet of phyllo and place it on a flat surface. Layer another sheet of phyllo on top. Brush the phyllo sheets with melted butter until they are evenly moistened.
1 pound phyllo dough, 1 cup melted butter
At the bottom edge of the buttered phyllo sheets, spread 1/2 cup of the ground beef mixture horizontally in a strip. Roll up the phyllo dough tightly, creating one long roll. Place it in a well-buttered 13x9-inch baking dish. Repeat this process with the remaining phyllo sheets.
There should be a total of 7 to 8 long rolls. Once arranged in the baking dish, slice each roll into four pieces. Cut all the way across the dish. (See picture in post.)
Partially bake the rolls in the preheated oven for 15 minutes.
While the rolls are baking, whisk together the milk, egg, a pinch of salt, and a pinch of black pepper.
1/3 cup milk, 1 large egg, Pinch black pepper, Pinch salt
Remove the partially baked phyllo rolls from the oven and brush the milk and egg mixture over all of the rolls making sure to cover them all.
Return the baking dish to the oven, and bake for an additional 15-20 minutes or until the top is golden brown.