Cook spaghetti in boiling salted water according to package instructions. Drain, rinse with cold water and let drain. Cut ham lengthwise in half. Whisk milk, 100 g cream cheese and eggs, season with salt, pepper and nutmeg.
Wash, clean and halve the tomatoes. Grease depressions of a muffin tin (12 depressions). Line each well with 1/2 slice of ham. Mix pasta with tomatoes
Spread the pasta mixture in the bowls. Pour egg milk over it. Put the rest of the cream cheese as a small blob on each nest and bake in a preheated oven (electric cooker: 175 °C/ convection oven: 150 °C/ gas: see manufacturer) for approx. 25 minutes. Wash the chives, shake dry and cut into fine rolls. Remove the noodle nests, sprinkle with chives and serve immediately