Make sure you select firm roma tomatoes and fresh shredded lettuce. The next step you will need to saute your lean ground sirloin in a skillet until you can hear the sizzle and all the pink is gone. Then you will need to add the taco seasoning and allow it to simmer for about ten to fifteen minutes. While that is simmering, you will need to dice your firm, red roma tomatoes and your onions into very small pieces so that they will pack into the warm taco shell easily.
When your taco meat is finished simmering, turn the heat off and let it to sit for a couple of minutes. You will now need to place your soft taco shells into the microwave and heat for twenty seconds. This will let you mold the taco much easier as the shell will stretch. Now you are ready to assemble your taco. You will need to place the taco shell on a glass plate; it sticks to a plastic plate.
First you can place a strip of meat on the shell, spread the shredded lettuce on top of that, then sprinkle the chopped, ripe tomatoes on, and any desired onions. You will then sprinkle the Mexican Blend cheese on that, and any desired taco sauce and sour cream. Lastly, you will need to gently roll the taco shell half way, then fold in each end, and roll the remainder of the way. Now your taco is ready to eat and enjoy! Be prepared with a bib and fork because you wont want to miss a bite of this juicy and spicy taco!