Well my questions to you are: how much homework is you daughter getting? when is it sent home and when is it due back to school? Check your schools homework policy (it should be online at the school districts website) and make sure the homework is in compliance. When my oldest was in K it was not. She would get 45-60 minutes of homework per night (thanks to a new teacher who was out of compliance). Homework should only take 15 mins MAX per night at this age/grade.
My youngest daughter is now in K (different school but same district) and she gets a mini book to read and five new sight words a week. We can easily do that in 5 minutes time and because she isn't doing any writing, etc. we can even do the homework while she is taking a bath or we can go out to dinner once in a while and take the homework with us! The teacher gave them each a homework folder that contains the homework. The folder is plastic and velcros shut so it is easy to tote around. It comes home on Friday and is due back on Thursday. This has made things so easy for us. Once in a while she gets "projects" that are really easy and fun but the teacher is good about giving us 1-2 weeks to work on them. We usually do the projects on the weekend since I work FT as well. The daily homework we do nightly but sometimes we forget or it J. doesn't get done and it isn't a big deal because as long as she can read her book and memorize her sight words she is good to go. They get tested on them on Thursday.
I didn't know what the homework would be like and I thought she woudl have to do more writing, glueing, cutting, etc. so I made her a "homework kit" to keep at home. It is a plastic tote box that has sharpened pencils, a large eraser, pencil sharpener, box of markers, box of crayons, glue bottle, and a glue stick. This way everything is together and we don't waste time looking for anything. I keep it on the shelf in her closet out of her reach so nothing gets lost. She hasn't needed it this year much but I'm sure it will come in handy next year. It can also be taken with us if we have somewhere that we need to go in the evenings.
As far as the meals, I would find quick & easy things to make. Stir fry, quesadillas, tacos, spaghetti, etc. You can even cook a little bit on the weekends to help during the week. For example, I try and cook chicken and ground beef/ground turkey in batches and freeze then pull out and thaw and I can have dinner done in about 15 minutes. Or have you tried crockpot meals? That way dinner is done when you get home. Serve them on a paper plate and then you can J. throw away most of the mess.
Can the recommended computer games be played on the weekend vs. the evenings when you have more time to help her? Can she start the homework at her after school child care center? Also, the book should be counted as homework. I know in our school district they're required to read for about 10-15 minutes a day and they're required to have no more than 15 minutes of homework per day at this age/grade. So the reading counts as part of the homework and that's why we're able to get the other homework done in 5 minutes per day.
Does she need a bath every evening? I give my daughter a bath every-other night unless she needs one on the off nights. Can you give her a quick bath?
As far as helping cook, arts & crafts, fun educational games, etc. I would say save it for the weekends. She imay even be getting some of this in after school care anyway. Really, the only thing she wants is your time. So reading books, snuggling, doing what you currently are doing and spending your evenings with her is all she really needs.