Not sure if this is peasant food, but it is street food. Maybe street food is modern day peasant food.
This popular vegetarian street food sandwich is from Trinidad.
'Doubles'.

Named doubles cause they are served with two 'barras'. Fried bread leaven with yeast and spiced with cumin seeds and turmeric. Turmeric also gives it the yellow hue.
They are topped with channa dal (Curried lentil: Made with fried onions, garlic, ginger, cumin seeds, garam masala, tomato paste, salt pepper, cilantro.) also mango chutney, hot sauce and grated cucumber.
Man I love these sandwiches so much. I always eat too much cause they are so good. A couple of beers and I am ready to explode.
I want to make the other famous sandwich; Roti, from Trinidad but havent done it yet. I would also like to learn how to make a Shark and Bake too. That sandwich is from Tobago.