Start by frying the tofu. Remove the tofu from the box and pat it dry with a paper towel. Slice it into bite size pieces. Heat a skillet on medium heat and add the oil. Add the tofu and fry for 10 minutes, flip and then fry for another 10 minutes. Remove from heat.
While the tofu is cooking make the sauce. To do this add the coconut sugar, ketchup, tamari, white vinegar, and granulated garlic to a bowl and whisk. Set aside.
Make the cauliflower rice by adding the oil and pineapple juice to a large skillet or wok. Add the frozen cauliflower rice and sauté for 12 minutes, stirring every 2 minutes. Once it is done remove it from the pan and set aside.
Now make the stir fry portion by adding the oil to the skillet or wok and heat on medium heat. Add the garlic, bell pepper, and onion. Sauté for 6 minutes stirring every 2 minutes. Reduce the heat to medium/low and add the pineapple. Allow the pineapple to cook for 4 minutes, then add the tofu and sweet and sour sauce. Stir to combine and heat for 3-4 more minutes.
Serve over the cauliflower rice.