Eco-sandwich with hamburger, caramelized onion and tomato

And because eco-sandwich? Well, because we often leave little things around that we don't know what to do later, at least it usually happens to me: If I have half a tomato, a piece of onion, I have some hamburgers that were left over from dinner ... I always look for myself some fix with these little leftovers and, in this case, I opted for a sandwich very quick and rich.

eco-sandwich

Degree of difficulty: Very easy

Preparation time: 5 minutes

Ingredients per sandwich:

  • Burgers already cooked
  • A piece of onion
  • Medium tomato
  • A bit of olive oil

The first thing we will do is heat a little olive oil and cook the julienned onion over low heat, until it turns a golden color.

eco-sandwich

Then we heat the hamburgers (I gave them a couple of turns with the onion), toast the bread for best results and cut the tomato into slices. We place all the ingredients inside the sandwich and that's it.

eco-sandwich

When serving ...

You can give it a British touch by accompanying it with potato chips.

Recipe suggestions:

  • You can add many more ingredients, it all depends on what you have left over from any other preparation such as: If you have leftovers chicken you can cut it into pieces, into cubes, into strips ... In any way that might look good. If you have a piece of carrot you can add it grated. You can still use a little corn, lettuce, mushrooms, etc. You just have to find a good combination of ingredients and enjoy.
  • If you wish you can add some salsa.

The best…

Any leftover you have in the fridge will be used to prepare a eco-sandwich or a eco-salad Do not forget!.


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