There is a difference between explaining ingredients and defending a meal before anyone tastes it. A clear description gives guests what they need without making dinner feel like a presentation.
Use names that describe the food: mushroom and lentil stew, lemon chickpea salad, apple crumble with oat topping. Mention ingredients relevant to dietary needs and answer questions honestly.
Avoid claims about health, purity, or how everyone will feel afterward. Those promises are unnecessary for a satisfying meal and may not fit every guest's circumstances.
You can be enthusiastic about the browned carrots or the sharp dressing without turning the table into a debate. If somebody is curious about plant-based cooking, there is room for that conversation. If they simply want another spoonful, that is a perfectly good response too.