Preheat the oven to 350°F (175°C). Brush both sides of the wonton wrappers with 1 tablespoon of olive oil. Press each wrapper into a mini muffin pan to form a cup. Bake for 8–10 minutes, or until lightly golden and crisp. Transfer to a wire rack and let cool completely.
In a bowl, toss the shrimp with the remaining 1 tablespoon olive oil, chili powder or Cajun seasoning, salt, and black pepper. Heat a skillet over medium-high heat and cook the shrimp for 1–2 minutes per side, just until opaque and cooked through. Remove from heat.
In a small bowl, mix the sour cream with lime juice and zest until smooth and creamy.
To assemble, spoon a small dollop of lime sour cream into each cooled wonton cup. Top with one shrimp and garnish with microgreens if desired. Serve immediately.