Bring water to a boil in a large pot. Add the lentil pasta and cook until al dente, about 6 to 8 minutes or according to package instructions. A few minutes into the pasta cooking, add the frozen broccoli and peas to the pot to soften and cook.
While the pasta and veggies are cooking, prepare the sauce. In a large skillet, heat the olive oil, garlic, and oregano and cook for a couple of minutes. Add the diced tomatoes with their juices and let everything simmer over low heat for 10 minutes.
You can leave the pasta sauce as "chunky" or transfer it to a blender to blend into a smooth sauce.
Drain the pasta and veggies in a colander and transfer to a large serving bowl. Add the sauce and mix until everything is coated.
Serve warm and enjoy!
To make fewer servings, prepare less pasta. If you do not have frozen broccoli or peas on hand, you can use any other frozen veggies.