Set up the slow cooker on low setting and let it warm-up
Meanwhile, brown up the chopped onion and garlic on a pan with 1 tsp of butter. Place in the slow cooker
Heat up two cups of water in a small pot and dissolve one cube of beef stock
Pat dry the meat with a paper towel and season with salt and pepper. You can sprinkle some thyme as well. Lightly brown the stakes (both sides) on the same pan by adding a bit more butter
Transfer the meat to the slow cooker and pour over the beef stock
Add al the remaining spices and give it a good mix. Make sure the meat is covered, if not add more water as needed
Slow cook for 6 to 7 hours. You can also set the slow cooker on high setting and cook for 4 to 5 hours. But remember, the longer the better
One hour before serving we will get on with all of the sides
Mash peeled avocados until smooth. Add 2tsp od lemon juice, 2tbs of diced red onion, and coriander. Season with salt to taste and mix well
Meanwhile, cook your rice according to the packaging instructions. Once cooked add 1tbs of chopped coriander and 1tsp of lemon juice. Mix it all together
Season the chopped tomatoes with 2 pinches of salt and 2tsp of lemon juice. Add 3tbs of chopped coriander and red onion. Mix all together
Cut bell peppers into strips, red onion into thin half-moon slices, and toss on a heated pan with 1sp of oil. Season with 1tsp of fajita seasoning. Give it a toss and cook until nicely charcoaled
Assemble your taco bowls and enjoy! For some spicy kick you can add some tabasco on top