Peel onion and garlic. Chop the onion finely, press the garlic through a garlic press. Heat fat in a pot, fry onion and garlic in it and add broth. Add deep-frozen spinach, cover and allow to defrost over medium heat for about 9 minutes. In the meantime wash, halve and seed the tomatoes. Dice the tomato halves.
Add to the defrosted spinach and bring to the boil while stirring. Season to taste with salt and pepper. Put the pasta in plenty of boiling salted water and boil it for about 5 minutes until it becomes bubbly. Drain the mozzarella. Pour the pasta onto a sieve and drain as well. Mix the noodles and mozzarella with the sauce, turn into nests as desired and arrange on plates