Pat the chicken breast and firm tofu dry with paper towels, then cut both into 1-inch cubes.
Heat the coconut oil in a large skillet over medium-high heat. Add the chicken cubes and cook for 3-4 minutes until golden brown.
Add the tofu cubes to the skillet and cook for another 2 minutes, stirring gently to avoid breaking the tofu.
Stir in the sliced red bell pepper, minced garlic, and grated ginger, sautéing for 2 minutes until fragrant.
Add the red curry paste and stir constantly for 1 minute to toast the spices and coat the proteins.
Pour in the full-fat coconut milk and bring the mixture to a gentle simmer. Season with sea salt and black pepper.
Reduce heat to medium-low and simmer for 5 minutes until the chicken is cooked through and the sauce has thickened slightly.
Fold in the fresh spinach and stir for 1 minute until the leaves are just wilted.
Serve immediately in a bowl, ensuring an even distribution of chicken, tofu, and aromatic sauce.