Sambar: Aigo style

Vegetables: Any left over vegetables (carrot, brinjal, beans, pumpkin radish etc.) onions, green chilies, drum sticks, tomatoes.
Chop all vegetables into large pieces.

Other ingredients: Turdal, tamarind, sugar
Red Chilies, curry leaves, fenugreek, mustard, cumin, hing, turmeric, salt

Sambar Masala : Roast red chilies, coriander seeds, fenugreek, cumin, curry leaves
Grind all roasted ingredients into powder.

Procedure

1: Cook Tur dal in pressure cooker until it is fully cooked.
2: Soak tamarind in warm water and extract pulp
(You can use ready tamarind pulp available in Indian stores)
3: In a pan add little oil, when the oil is hot, add mustard, cumin, fenugreek seeds, when mustard crackles add curry leaves. Add turmeric & hing.
Next add all cut vegetables, cover and cook for some time.
4: When vegetables are cooked add tamarind pulp, add enough water and cook for some more time.
5: Add 2 spoons of ground Sambar Masala and cook for 5 more minutes. Add salt to taste & little sugar.
6: Mash cooked dal well and add to the boiled vegetables. Cook for few more minutes.

Note :
You need to balance the quantities of salt, tamarind and sugar to get the correct taste and flavor.
You have a choice of making your sambar either thick or thin as required by adjusting quantities of dal and tamarind water.