This is really easy, as you know I like my recipes to be, and only requires five ingredients. I think you could also chop the onions finer, to make the consistency a little different; in that case, you will probably need to sauté the onions for about 10-15 minutes, rather than 20-25 minutes as stated in the recipe.
Heat the olive oil in a medium-sized 8- to 10-inch skillet over medium heat. Add the onion and thyme; sprinkle with a pinch each of salt and pepper. Sauté the onions until softened and golden brown, about 20-25 minutes.
Add the peas and sauté until they have turned bright green in color, about 2-3 minutes. Remove from heat and stir in the mint. Season with additional salt and pepper, to taste, and serve.