1-First Step: Preheat oven to 375°F (190.5°C). Line a baking sheet with aluminum foil to make cleanup easier and prevent sticking.

2-Second Step: In a large mixing bowl, combine all meatloaf ingredients with a spatula, then use hands to mix thoroughly. This includes 2 lbs ground chuck, 1 cup diced yellow onion, and the rest as listed earlier. Shape the mixture into a loaf on the lined baking sheet for even cooking.

3-Third Step: Prepare the glaze by whisking together 1/3 cup ketchup, 2 tablespoons brown sugar, 1/2 teaspoon dry mustard powder, and 1 tablespoon steak sauce in a small bowl.

4-Fourth Step: Spread half the glaze over the meatloaf to lock in flavors before baking.

5-Fifth Step: Bake for 1 hour in the preheated oven. Then, apply the remaining glaze and bake for an additional 15 minutes or until cooked through. Use a meat thermometer to check that it’s at the right temperature.

6-Final Step: Let the meatloaf rest for 10 minutes before slicing into 1-inch pieces. Serve with desired sides like veggies or potatoes for a complete meal. The total preparation time is approximately 15 minutes prep and 1 hour and 15 minutes cook time, making it ideal for weeknights.