While there's no right or wrong way to build a delicious taco, I have found through many years of research and development this order works best for me.
  1. With a spoon, paint a layer of sour cream on the inside of the shell
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  2. Add a layer of sharp cheddar cheese
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  3. Add a layer of ground beef or chicken. Putting the hot meat or chicken on top of the cheese will melt it a little.
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  4. Top the meat or chicken with taco sauce. Pouring the sauce on top of the meat allows it to absorb into it nicely.
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  5. Add a layer of shredded lettuce
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  6. Add a layer of diced fresh tomatoes. The tomatoes on top weigh the lettuce down.
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  7. Gently press everything into the shell and enjoy!