Heat the vegan butter in a large pot over medium-high heat. Add the zucchini and cook, stirring occasionally until golden, about 6 minutes. Now add in the asparagus, carrot, and garlic, and cook, stirring occasionally for a further 4 minutes. Stir in the peas, green onions, red pepper flakes, oregano, and season with salt and black pepper. Cook, stirring occasionally until the peas are warmed through, around 5 minutes.