Place 200 g of frozen peas in a bowl or high mixing bowl. Pour boiling water over them. For the noodles, boil 3-4 l salted water (1 teaspoon salt per litre).
Peel the garlic and chop roughly. Drain the peas in a sieve and let them drain. Finely mash the drained peas, garlic, sour cream and oil with a hand blender. Season to taste with salt and pepper. Cook pasta in boiling salted water according to package instructions.
Meanwhile, roast the pine nuts in a pan without fat until golden brown. Take them out. Clean, wash and drain the spinach well. Crumble the feta coarsely. Add the remaining 200 g of frozen peas to the pasta in the last 2-3 minutes, cook at the same time.
Drain the noodles and peas, collecting 3-4 tablespoons of pasta water and stir into the pureed sauce. Drain noodles and peas briefly. Then put them back into the pot. Mix with sauce, spinach leaves and feta.
Arrange and sprinkle with pine nuts.