今天下一整天雨，没有阳光，气温很低。天气令人不适，因此我们不想出门。（first explain the reason, and then tell your decision)

今天午餐我做了马铃薯泥配蘑菇酱，非常美味。饭饱餍足(it's a high level chinese idiom, we don't usually use it for oral communication, but in article, it's a very good and superlative expression)后，我坐在沙发上休息了一下。

今天下午我们做了锅贴，我亲手做了锅贴皮、准备了馅料，我很喜欢自己做锅贴或水饺皮。(if you said 一开始 means 'at the first', then you need to write what afterward...like firstly,secondly...So just simply delete this word)

上个月我们去了大城市，超市里有很多不同种类的食物，甚至有鞋子和衣服。

他们有很多的产品，甚至有点过于丰富了，可是我还是很开心可以买各种各样的东西！(the conjunction word is not right, 虽然need to go with 但是, a little be like although...but...,but in this case, you better not neglect 'but'.)

我发现在亚洲有很多吃素食和吃全素的人，我猜因为这里有很多很好吃的素食，这真的很有趣。（better use subject in this sentence, the grammer is basically right, i just simplify them)

Overall, the grammer in this article is OK, i change some expressions to make it conform to our writing practice.