- Preheat oven to 400°F; then reduce to 350°F (after zucchini is cooked). 
- Prepare the sofrito by combining all ingredients (roughly chopped) into a food processor. Pulse until combined. Set aside.  
- Slice the zucchini lengthwise so that they are 1/2" thick.  
- Place the sliced zucchini on a lined baking sheet, brush with 1 tbsp of olive oil and season with salt and pepper.  
- Bake the sliced zucchini in a preheated oven for 20 minutes.  
- Once the zucchini is done cooking, transfer to a paper towel to remove the excess moisture. Reduce the oven temperature to 350°F.  
- Meanwhile, prepare the filling.  
- Heat 2 tbsp of canola oil in a large pan over medium-high heat. Add 2-4 tablespoons of the sofrito (to taste) and cook for 1-2 minutes until fragrant.  
- Add the ground beef and cook until lightly browned. Add adobo seasoning and continue to cook until fully browned.  
- Add dissolved bouillon cube to the beef and combine.  
- Stir in diced tomatoes (or low carb tomato sauce).  
- Add tomato paste (optional, but recommended if uses fresh diced tomatoes).  
- Reduce heat to medium and let simmer for approx. 10 minutes, or until most of the liquid is reduced.  
- Meanwhile, prepare the plantains.  
- Heat 1/3 cup of canola oil in pan over medium-high heat.  
- Peel the plantains and slice lengthwise. You should get about 3-4 slices per plantain.  
- Once the oil is hot, fry the plantains in batches until both sides are golden brown.  
- Transfer to a paper towel.  
- Assemble the Pastelón 
- Layer the cooked zucchini on the bottom of the baking dish.  
- Top with half of the meat mixture and then half of the whisked egg mixture.  
- Add half of the grated cheese.  
- Assemble the fried plantains on top of the mixture.  
- Finish off the Pastelón with the remaining ground beef mixture and whisked egg (final layer of mozzarella will be added later).  
- Cover with aluminum foil and bake for 25 minutes.  
- After 25 minutes, remove the aluminum foil and add the final layer of mozzarella cheese.  
- Bake uncovered for 10 minutes. Optional, broil at the last few minutes to brown the cheese.  
- Once the Pastelón is done cooking, remove from oven and let it rest for 15 minutes.  
- Enjoy!