Tostones with Avocado Crema

for the Avocado Crema
1 Add all ingredients to a wide-mouth mason jar. Blend until smooth and creamy with an immersion blender (or use a food processor). Taste for seasoning and adjust salt or lime juice as required.
for the Tostones
1 Preheat a cast-iron or non-stick skillet over medium heat. Meanwhile, peel the plantains and cut into 1" discs on a bias. 
2 Add 1/4 cup of oil to pan and carefully place plantain slices in hot oil. Fry 2-3 minutes per side. Transfer par-cooked plantains to a tray lined with paper towel. Using the bottom of a cup or ramekin, gently smash each of the plantains into discs.
3 Return the smashed plantains back to the oil and fry for an additional 2-3 minutes per side or until golden brown and crispy.
4 Transfer fried tostones to the tray lined with paper towel and season with coarse sea salt. Serve immediately or keep warm in a 200F oven until ready to serve.