Eating vegetables that are not washed and eating from utensils that are not washed

What is the ruling for the following:

1. If someone cooked veges without washing them (veges might have some dirt like on it) and eatimg them, would this be halal?

2. If someone does not wash the cooking utensils and cooks in this way, would consuming the food prepared in those unwashed utensils be halal?

3. If roti is prepared on a 'tawa' which releases some of its black particles, when roti is heated over it, the black particles stick on the roti, will consuming the roti with those tawa black particles halal?