In a medium-sized saucepan, whisk together the polenta, water, olive oil and salt. Whisk continuously to prevent lumps from forming.
Bring the mixture to simmer, stirring occasionally, for about 20-25 minutes or until it reaches a creamy consistency.
Stir in the butter until well combined. Keep warm while preparing the shrimp and snow peas.
In a large skillet, heat the olive oil over medium-high heat.
Add the shrimp and snow peas to the skillet and sprinkle with Cajun seasoning and a pinch of salt. Cook for 5-6 minutes until the shrimp are pink and cooked through.
Divide the creamy polenta between two serving bowls.
Top the polenta with the spicy shrimp and snow peas mixture.
Sprinkle crumbled feta over the top and drizzle with a little extra olive oil if
desired.