Praise the hamburgers!
The hamburger with fries we tried the first night in a restaurant was a bit disappointing, so another night we tried the hamburgers sold opposite Iglesia La Merced. They were big, tastful, cheap (18 cordobas) and, very important,afterwards no stomach problems. Afterwards almost every day we went for a hamburger or the smaller hotdog (1 sausage 7 and 2 sausages 10 cordobas). Look for the stall which is covered with paintings of tourist attractions of Leon and surroundings.

Hostel Kolibri with kitchen
Just around the corner of the postoffice, opposite Iglesia La Recolección is Hostel Colibri (same owner as of Hostel La Iguana). Its clean, has big rooms, with shared bathroom. Nice hangout area with thatched roof, hammocks and inside dining area with television. Also place to do your laundry. Beds are the only dissapointing part, very thin and foam, but the cleaniness, spacious rooms and fully equipped kitchen make up for that. Double 200 cordobas and if you stay longer 170 (10 USD).