Cut the garlic into slices, onion into large cubes, celery slices, and pumpkin into large cubes. In a pan with a thick bottom, fry garlic, onions, celery in hot oil. Then add the pumpkin and fry for about 15 minutes stirring all the time. Peel the apple and cut into a cube, send to the pan, fry for 3 minutes, stirring occasionally. Pour boiling water, cover and cook until soft pumpkin, about 5-7 minutes. When the pumpkin is soft, drain all the liquid into a separate container (do not pour out). Salt vegetables to taste, grind with a blender. Add butter, continue whisking with a blender. Add the broth a little and beat until a homogeneous liquid mass. Serve hot soup with crackers.