Heat a splash of extra virgin olive oil in a large saucepan over medium heat.
Add the minced onion, carrots, celery, and the halved cherry tomatoes and sauté for about 10 minutes, until vegetables are softened.
Stir in the rinsed red lentils and the risotto rice and toast them with the vegetables for about 3 minutes, stirring constantly.
Pour in half of the hot vegetable broth, bring to a boil, then reduce the heat to low so the mixture simmers gently.
Add the frozen peas.
Gradually add the remaining hot broth by ladle, a little at a time, stirring frequently to prevent sticking and encourage a creamy texture; continue cooking until the rice and lentils are tender, about 17 minutes total from when the broth was first added.
Season with the salt and pepper, then remove the pan from the heat when the risotto is creamy and cooked through.
Stir in the grated Parmigiano Reggiano (to taste) and the chopped parsley, then drizzle a little extra virgin olive oil before serving.
Serve immediately.