There's a good resource from the British Nutrition Foundation on toddler diet. I'd recommend the pdf they have a link to on this page.
My one month old generally eats the same as us. I make extra and freeze portions where I can, but some quick meals on our house would be:
Scrambled egg with smoked salmon/ham and peas mixed in. Offered with a crumpet or toast.
Lentil and sweet potato curry made in the instant pot, but would cook quite fast on the hob. Served with rice.
Tuna fish patties.
Roast root veg of any kind are always received well and require minimal effort. Served with whatever protein you are offering.
Steamed veg like baby corn, green beans, asparagus usually accepted.
Hummus and bread sticks with cucumber, olives and grated carrot/cheese.
Baked potatoes with cheese and beans.
Cheese on toast with chopped tomatoes/pepper and ham/chorizo.
Peanut butter or mashed avocado on toast.
You can buy pizza dough on a roll or puff pastry and top with whatever you like.
Meat options are trickier as my son doesn't have many teeth and isn't interested in gumming hunks of meat, but I use the instant pot with beef and lamb recipes to get them really tender without having to slow cook for hours. Failing that he sometimes gets meat balls or a sausage.
Frozen fish or even fish fingers are good to have in the freezer for a quick meal.