Cycle Soupwalla or Sagar Gaire (multiple outlets but the one at 7 no. market is the best) is a really famous food stop in Bhopal for soup, sandwiches or pasta. Their cheese soup, triple decker cheese sandwich and veg. biryani are very well done. Popular among students and adults alike, it is quite crowded at meal times.
For more locally-recommended eateries in Bhopal, check out the post below.
Explorer Diaries: Bhopal On Your Plate
Pic Credit: Sagargairefastfoodcorner