Preheat your oven to 400°F (200°C). Line a baking tray with parchment paper.
In a saucepan, cook the red lentils until tender if not pre-cooked. Drain and set aside.
In a large skillet, heat the olive oil over medium heat. Sauté the chopped onion and minced garlic for 2-3 minutes until softened.
Add the diced carrot, potato, and green peas to the skillet. Cook for another 5-7 minutes until the vegetables are tender but still hold their shape.
Mix in the cooked red lentils along with a pinch of cumin, coriander, salt, and pepper (spices to taste). Stir well and simmer for 2 minutes. Remove from heat and let the filling cool slightly.
Using the whole wheat flour mixed with a small amount of water (just enough to form a pliable dough), roll out thin circles. Place a spoonful of the lentil-vegetable filling in the center of each circle, then fold and seal the edges tightly to form samosa shapes.
Place the assembled samosas on the prepared baking tray. Bake in the preheated oven for 20-25 minutes until the pastry is golden and crisp.
While the samosas bake, prepare the mint chutney by blending together the fresh mint leaves, nonfat yogurt, lime juice, a pinch of salt, and a little water to reach desired consistency.
Remove the samosas from the oven and serve warm with the refreshing mint chutney on the side.