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1
Preheat oven to 400F.
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2
Combine the tomato sauce, barbecue sauce and sugar in a small saucepan over medium heat.
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3
Heat the mixture until it begins to bubble, stirring often, and then remove it from the heat.
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4
In a large bowl, add all but 2 tablespoons of the tomato sauce to the meat.
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5
Use a large wooden spoon or your hands to work the sauce into the meat until it is very well combined.
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6
Combine the remaining ingredients with the ground sirloin-- flour, salt, onion powder and ground pepper.
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7
Use the wooden spoon or your hands to work the spices and flour into the meat.
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8
Load the meat into a loaf pan (preferably a meatloaf pan with two sections which allows the fat to drain, but if you don't have one of those a regular loaf pan will work).
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9
Wrap foil over the pan and place it into the oven for 30 minutes.
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10
After 30 minutes, take the meatloaf from the oven, remove the foil and, if you aren't using a meatloaf pan, drain the fat.
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11
Using a knife, slice the meatloaf all the way through into 8 slices while it is still in the pan.
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12
This will help to cook the center of the meatloaf.
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13
Pour the remaining 2 tablespoons of sauce over the top of the meatloaf, in a stream down the center.
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14
Don't spread the sauce.
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15
Place the meatloaf back into the oven, uncovered, for 25-30 minutes or until it is done.
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16
Remove and allow it to cool for a few minutes before serving.
