In a large skillet or wok, heat the coconut oil over medium heat.
Add the sliced onion and sauté for 3-4 minutes until translucent.
Stir in the minced garlic and grated ginger, cooking for an additional minute until fragrant.
Add the sliced red bell pepper and bamboo shoots, cooking for another 2-3 minutes until slightly tender.
Pour in the coconut milk and stir in the red curry paste, brown sugar, and soy sauce. Mix well to combine all the ingredients.
Bring the mixture to a simmer, then add the snap peas and spinach. Cook for an additional 4-5 minutes, or until the peas are tender-crisp and the spinach is wilted.
Taste and adjust seasoning as necessary.
Remove from heat and garnish with fresh basil leaves.