Why? There is no need to rush foods that aren't smooth. Ensure that all foods are cut into easily managed, small pieces. Allow the baby to explore the food, and to feed him/herself under supervision. Babies explore by putting things in their mouths , and will eventually "get it". If they're too small for that, they're too small to be eating chunks anyway. Watch closely for choking hazards.
Experiment. Depending on the age of your child, some teeth are needed for the chunkier and more solid foods. Be patient and it's trial and error.