You can start by first soaking the poha, to that, take the poha (rice flakes) in a strainer, rinse with fresh water and let it rest for couple of minutes. Once it's soaked, mash it & keep it aside to be used later.
Now, set a pan on medium heat, add oil & butter, let the butter melt & further add onions, & garlic, stir & cook on medium high flame until the onions turn translucent.
Now, add the french beans, carrots, boiled green peas & green chillies, stir & cook on high flame for 2-3 minutes.
Now, low down the heat & add the powdered spices, stir well, further grate & add the boiled potatoes & salt to taste, cook on medium high flame while mixing & mashing the potatoes.
Further add the soaked & mashed poha & freshly chopped coriander leaves. Use a potato masher to lightly mash & combine the mixture well.
Further switch off the flame & remove the mixture in a bowl & allow it cool down to room temperature. Once it cools down, cover with a cling wrap & refrigerate for 12-15 minutes.
Keep it in the refrigerator to shape the patties.