Bring a large pot of salted water to a boil. Add 200 g whole wheat or Slimming World-friendly spaghetti and cook according to package instructions until al dente. Drain, reserving a small cup of pasta water.
In a non-stick skillet over medium heat, cook the chopped 100 g lean smoked bacon or pancetta until crispy. Add the minced 1 clove garlic in the last 30 seconds and sauté briefly. Remove from heat.
In a bowl, whisk together the 2 large eggs, 3 tbsp fat-free natural yogurt, and 30 g grated Parmesan cheese. Add 1/2 teaspoon black pepper.
Toss the hot drained spaghetti with the bacon and garlic in the skillet. The heat from the pasta will slightly cool the mixture, preventing the eggs from scrambling.
Pour the egg-yogurt mixture over the pasta, tossing quickly and continuously to create a creamy sauce. If it’s too thick, add a little reserved pasta water until you reach your desired consistency.
Taste and adjust seasoning with 1 teaspoon salt and pepper. Garnish with chopped parsley and extra Parmesan if desired. Serve immediately.