Preheat the oven to 375°F In a large skillet, cook the bacon over medium heat until crisp, about 10 minutes; drain.
Meanwhile, in a large pot of boiling, salted water, cook the pasta until almost al dente; drain. In the same pot, bring the milk to a simmer over medium heat; whisk in the turmeric and stir in the cream cheese. Stir in the cheddar cheese until melted. Add the pasta, bacon and tomatoes; season with salt and pepper. Transfer to a 9-by-13 inch casserole dish and bake until heated through, about 20 minutes.
Meanwhile, in a large bowl, combine the yogurt and vinegar; season with salt and pepper. Add the lettuce and toss to coat. Serve the salad with the pasta.